Question: Into which sea does the River Nile flow? Answer: The Mediterranean Question: Which river separates Devon and Cornwall? Answer: River Tamar Question: What is the alternative name used for the River Thames in its upper reaches and, particularly, in Oxford? Answer: The Isis Question: In which country would you find the Angel Falls, the highest uninterrupted waterfall in the world? Answer: Venezuela Question: Into which sea does the River Volga flow? Answer: The Caspian Sea Question: Which river discharges the greatest volume of water in the world? Answer: The Amazon Rivers